10,000-YEAR-OLD Petroglyphs in Nevada Could Be the Oldest in America

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

U.S. scientists found the petroglyphs on limestone boulders near Pyramid Lake in northern Nevada's high desert

The carvings are abstract with tightly clustered geometric designs including diamond patterns and short parallel lines

One theory suggests the etchings represent meteorological symbols but others think they are old patterns created by Native Americans


http://www.dailymail.co.uk/sciencetech/article-2394340/Ancient-petroglyphs-Nevada-oldest-rock-carvings-North-America.html